US153873A - Improvement in saw-mills - Google Patents

Description

H. 0., E. N. a c. T. WICKES.

Saw-Mills. N0.153,873. Patented Aug. 4, 1874.

THE GRAPH IC CO- PHOTO-LIT" UNITED STATES PATENT QFFIGE.

HENRY D. WIOKES, EDWARD N. WIGKES, AND CHARLES T. WIOKES, OF EAST SAGINAW, MICHIGAN.

IMPROVEMENT IN SAW-MILLS.

Speciiication forming part of Letters Patent No. 153,873, dated August 4, 1874; application filed June 17, 1874. I

into lumber, at one operation, without firsthein g obliged to slab it or convert it into a cant, as has heretofore been the case. Our invention consists in placing in front of the first feed-roll of a flat-gang a revolving cutter-head, which will plane or cut a flat surface on the under side of the log, as it is fed toward the saws, of sufiicient width to have such a bearing upon the feed-rolls as will prevent the log from turning thereon.

Figure l is a perspective view, showing the application of our improvement to a flat-gang.

Fig. 2 is a cross-section of the same.

In the drawing, A represents the frame of a flat-gang saw-mill, in the lower part of which the feed-rolls B B are journaled and geared together, by an intermediate gear, in the usual way. bearings at the top of standards a, in front of and parallel with the front feed-roll. The cutter-head carries two heavy planer-knives 1), securely bolted thereto, and is driven at a rate of one thousand three hundred revolutions per minute, or thereabout, from any conven- We journal a cutter-head, 0, in suitable ient source of power, preferably below the mill-floor. The top edges of the planer-knives are on an exact level with the feed-rolls at the highest point in their revolution. The log is run over a skid or head-block of ordinary construction, (not shown,) just in front of the cutter-head, and on a carriage at the tail end, the bar or head-blockand carriage being just enough lower than the feed-rolls to permit the cutter-head to remove a portion of the log as it passes over it, cutting away enough of the timber to leave a flat space six to ten inches wide at the bottom of the log, which gives the log a firm bearing upon the feed-rolls, and prevents its turning thereon. The entire log is thus out into boards. The supporting-bar moves forward with the log on two ways until the latter rests fairly on the first feed-roll, when the bar is dropped away from the log.

What we claim as our invention, and desire to secure by Letters Patent, is-

The combination of the gang-saws A with the cutterhead O and feed-rolls B B, when constructed and operating in the manner substantially as herein shown and described, and for the purpose specified.

HENRY D. WIGKES. EDWARD N. WIOKES. CHARLES T. WIOKES.

Witnesses:

JOHN MGARTHUR, HERMAN B. ZWERT.

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